Hillhead 2012
19 - 21 June 2012
International live demonstration show for the quarrying, recycling and heavy construction industries at Hillhead Quarry, Buxton, UK.
inverse square law
The intensity of a field of radiation is inversely proportional to the square of the distance from the source. This applies, for example, to the intensity of sound at a distance from a source.
The monthly journal for the quarry products industry.